메뉴 건너뛰기




Volumn 132, Issue 34, 2010, Pages 11988-11992

Catalytic asymmetricaza-Morita-Baylis-Hillman reaction of methyl acrylate: Role of a bifunctional La(O- i Pr)3/linked-BINOL complex

Author keywords

[No Author keywords available]

Indexed keywords

ALKENYL; BIFUNCTIONAL; CATALYTIC AMOUNTS; ENOLATES; INITIAL RATE; KINETIC ISOTOPE EFFECTS; LEWIS ACID; LEWIS ACIDIC; METAL CATALYST; METHYL ACRYLATES; MORITA-BAYLIS-HILLMAN REACTION; NUCLEOPHILICITIES; ORGANOCATALYSTS; RARE EARTH METALS;

EID: 77956077305     PISSN: 00027863     EISSN: 15205126     Source Type: Journal    
DOI: 10.1021/ja103294a     Document Type: Article
Times cited : (70)

References (46)
  • 1
    • 77956069256 scopus 로고    scopus 로고
    • General review on aza-MBH reactions and their applications
    • General review on aza-MBH reactions and their applications
  • 3
    • 77956087105 scopus 로고    scopus 로고
    • Reviews on catalytic enantioselective aza-MBH reactions
    • Reviews on catalytic enantioselective aza-MBH reactions
  • 15
    • 70349934416 scopus 로고    scopus 로고
    • For selected recent examples, see
    • For selected recent examples, see: Abermil, N., Masson, G., and Zhu, J. Org. Lett. 2009, 11, 4648
    • (2009) Org. Lett. , vol.11 , pp. 4648
    • Abermil, N.1    Masson, G.2    Zhu, J.3
  • 21
    • 77956082180 scopus 로고    scopus 로고
    • For partially successful early trials using acrylates, see ref 3a, 3c. See also
    • For partially successful early trials using acrylates, see ref 3a, 3c. See also
  • 24
    • 77956091687 scopus 로고    scopus 로고
    • 3/linked-BINOL 1a complex as a Lewis acid/Brønsted base bifunctional catalyst for asymmetric Michael reaction of malonates
    • 3/linked-BINOL 1a complex as a Lewis acid/Brønsted base bifunctional catalyst for asymmetric Michael reaction of malonates
  • 27
    • 77956088776 scopus 로고    scopus 로고
    • For synthesis of linked-BINOLs, see 1a
    • For synthesis of linked-BINOLs, see 1a
  • 30
    • 77956093993 scopus 로고    scopus 로고
    • 3 complex with DABCO was reported as an efficient system for the reaction of aldehydes with acrylates
    • 3 complex with DABCO was reported as an efficient system for the reaction of aldehydes with acrylates.
  • 32
    • 5344224096 scopus 로고    scopus 로고
    • For reviews on acid/base bifunctional asymmetric catalysis, see
    • For reviews on acid/base bifunctional asymmetric catalysis, see: Ma, J.-A. and Cahard, D. Angew. Chem., Int. Ed. 2004, 43, 4566
    • (2004) Angew. Chem., Int. Ed. , vol.43 , pp. 4566
    • Ma, J.-A.1    Cahard, D.2
  • 37
    • 77956067793 scopus 로고    scopus 로고
    • Initial screening with other BINOL derivatives resulted in poor enantioselectivity
    • Initial screening with other BINOL derivatives resulted in poor enantioselectivity.
  • 38
    • 37849014325 scopus 로고    scopus 로고
    • For positive effects of achiral Brønsted acids to accelerate catalytic asymmetric aza-MBH reaction, see refs 3e, 5a, and 7. The effects of the proton source in Morita-Baylis-Hillman reactions of aldehydes were investigated in detail; see:, and references therein
    • For positive effects of achiral Brønsted acids to accelerate catalytic asymmetric aza-MBH reaction, see refs 3e, 5a, and 7. The effects of the proton source in Morita-Baylis-Hillman reactions of aldehydes were investigated in detail; see: Robiette, R., Aggarwal, V. K., and Harvey, J. N. J. Am. Chem. Soc. 2007, 129, 15513 and references therein
    • (2007) J. Am. Chem. Soc. , vol.129 , pp. 15513
    • Robiette, R.1    Aggarwal, V.K.2    Harvey, J.N.3
  • 39
    • 77956077972 scopus 로고    scopus 로고
    • 2,6-Di- t Bu-phenol, 2,6-di- t Bu-4-MeO-phenol, 2- t Bu-phenol, and 2- t Bu-4-MeO-phenol also had positive effects, and 4a was obtained in greater than 80% yield and 87-89% ee. 4,4′-Thiobis(6- t- Bu- m -cresol) was selected for further studies, because it gave the highest enantioselectivity
    • 2,6-Di- t Bu-phenol, 2,6-di- t Bu-4-MeO-phenol, 2- t Bu-phenol, and 2- t Bu-4-MeO-phenol also had positive effects, and 4a was obtained in greater than 80% yield and 87-89% ee. 4,4′-Thiobis(6- t- Bu- m -cresol) was selected for further studies, because it gave the highest enantioselectivity.
  • 40
    • 77956079063 scopus 로고    scopus 로고
    • For the utility of 4,4′-thiobis(6- t- Bu- m -cresol) as a radical inhibitor in organic synthesis, see
    • For the utility of 4,4′-thiobis(6- t- Bu- m -cresol) as a radical inhibitor in organic synthesis, see
  • 43
    • 77956085679 scopus 로고    scopus 로고
    • The absolute configuration of 4a was determined by comparing the sign of the optical rotation with the reported data reported in ref 8b
    • The absolute configuration of 4a was determined by comparing the sign of the optical rotation with the reported data reported in ref 8b.
  • 44
    • 77956070333 scopus 로고    scopus 로고
    • 85% deuterated 3 was used for the experiments depicted in Figure 2. The degree of deuteration of 3 did not change under the reaction conditions in Figure 2 as confirmed by NMR
    • 85% deuterated 3 was used for the experiments depicted in Figure 2. The degree of deuteration of 3 did not change under the reaction conditions in Figure 2 as confirmed by NMR.
  • 45
    • 77956069255 scopus 로고    scopus 로고
    • See Supporting Information for experimental data
    • See Supporting Information for experimental data.
  • 46
    • 77956081415 scopus 로고    scopus 로고
    • Possibility of the enantio-differentiation at the proton transfer step, which is often postulated in other systems (see ref 6), cannot be excluded. But, we speculate that the enantioselectivity would be kinetically determined at the C-C bond-formation step, because the proton transfer step is fast in the present system
    • Possibility of the enantio-differentiation at the proton transfer step, which is often postulated in other systems (see ref 6), cannot be excluded. But, we speculate that the enantioselectivity would be kinetically determined at the C-C bond-formation step, because the proton transfer step is fast in the present system.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.